Bow sight



WU?! mm CROSS HEP QR'ENCE N T. R. SMITH June 16, 1964 BOW SIGHT Filed June 1, 1960 Thomas R. Smith 1N VENTOR.

United States Patent 3,137,755 BOW SIGHT Thomas R. Smith, RD. 1, Box 621, Portage, Pa. Filed June 1, 1960, Ser. No. 33,263 4 Claims. (Cl. 882.2)

This invention relates generally to archery equipment and more particularly to a sight construction adapted to be mounted on conventional archery bows.

Regardless of whether one is firing bullets or shooting arrows, it is necessary to adjust for windage and elevation before the target can be properly zeroed in. In order to adjust for windage and elevation, sights are often provided which are mounted on the bow Or firearm in a convenient position allowing for the user to accessibly sight therethrough while remaining in his normal firing position. Of course, in order to adjust for windage, it is necessary to be able to move the sight reciprocally from left to right and vice versa. In order to adjust for elevation, it is necessary to move a single sight up and down or to effectively move the distance between two spaced lenses. The latter method may include the actual movement of concave-convex lenses or the relative rotation of prism lenses which effectively changes the sighting distance between the lenses.

The primary object of this invention is to provide a novel bow sight adapted to be mounted on a conventional archery bow wherein a pair of spaced relatively rotatable prism lenses are employed.

It is a more particular object of this invention to provide a novel bow sight construction adapted to be conveniently and accessibly mounted on a conventional bow for use by an archer in normal position. Moreover, it is an object of this invention to provide said bow sight with means which allow for simplified adjustments to compensate for windage and elevation.

It is a still further object of this invention to provide a novel bow sight construction which is compact, inexpensive, and rugged. The device includes relatively few moving parts and accordingly, should have a long maintenance free life.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a side elevational view of a portion of an archers bow illustrating the manner in which the bow sight is mounted thereon;

FIGURE 2 is an enlarged horizontal sectional view taken substantially along the plane 22 of FIGURE 1;

FIGURE 3 is an enlarged vertical sectional view taken substantially along the plane 33 of FIGURE 2;

FIGURE 4.is a sectional view taken substantially along the plane 4-4 of FIGURE 3; and

FIGURE 5 is a perspective view of the tubular member comprising the central hub.

With continuing reference to the drawing, the numeral generally represents a conventional archers bow utilizing a string 12 to propel an arrow 14. The bow 10 is provided with a hand-grip portion 16 above which the bow sight 18 comprising this invention is adapted to be mounted.

A bracket 20 includes a pair of spaced rearwardly extending arms 22 and 24 which are received on opposite sides of the bow 10. A strap 26 extends through the bracket 20 and around the bow 10 and is secured by a fastener 28 of any convenient construction. The bracket 20 is provided with a T-slot below a winged setscrew ice 30 through which the T-shaped sight arm 32 is adapted to slide. The sight arm 32 is preferably provided with graduated indicia. By loosening the winged setscrew 30, the sight arm 32 is free to slide through the T-shaped slot passage defined in the bracket 20. The indicia defined on the sight arm 32 give indication of windage adjustments. By taking several zero shots, the sight arm 32 may be properly positioned with respect to the bracket 28 and bow 10 so that the windage is compensated for. The winged setscrew 30 which extends into the T-shaped slot passage perpendicular to the sight arm 32 may then be tightened to secure the sight arm 32 in place. The T-shaped sight arm 32 may in fact comprise a pair of angles 34 and 36 mounted and secured back to back.

Terminally supported on the sight arm 32 in fixed relationship thereto is a central tube or tubular member 38 comprising a hub. The central tubular member 38 is shown in perspective in FIGURE 5. It will be appreciated that the tubular member 38 is open on either end thereof. Circumferential slots 40 and 42 are defined in the tubular member 38 proximate opposite ends of the member 38. The slots 40 and 42 extend through approximately 180 degrees on diametrically opposite sides of the tubular member 38. A projection or radial shaft 44 is secured to the tubular member 38 extending radially therefrom.

Sleeves 46 and 48 are rotatably mounted on each end of the tubular member 38. Each of the sleeves 46 and 48 is provided with a radially extending shouldered screw 50 which extends into and slides in the respective slots 40 and 42. Accordingly, the sleeves 46 and 48 are rotatable on the tubular member 38 as a hub but are fixed from any longitudinal movement with respect thereto. The sleeves 46 and 48 are terminally threaded as at 52.

End caps 54 and 56 are respectively received on the sleeves 46 and 48. Each of the end caps 54 and 56 includes an internally threaded ring 58 and a cap mem ber 68 which fits about the ring 58 and is secured thereto by setscrews 62 which extend through the cap member 60 and ring 58. The cap member 60 is substantially cylindrical and defines an inwardly extending end flange 64. A prism lens 66 is received between the flange 64 of the cap member 60 and the ring 58 while a prism lens 68 is likewise received in the end cap 56. It is to be particularly noted in FIGURE 4 that the prism lenses 66 and 68 are oppositely positioned. It will be appreciated that the prism lenses 66 and 68 are received between the cap member 60 and rings 58 which are held together by setscrews 62. With the prism lenses securely so held, the rings 58 are screwed on to the threaded portion 52 on the sleeves 46 and 48, respectively. The setscrew 62 may then be turned further to bear against the threaded portion 52 of the sleeves 46 and 48.

Rotatably mounted on the projection 44 is a cog 70 provided with a plurality of spaced teeth 72 formed on a reduced portion 74 with an enlarged cog portion 76 formed integral therewith. The enlarged portion 76 of the cog 70 is provided with graduated indicia 78 thus providing a dial. An indicator pointer 80 is fixed to the projection 44 to coact with the indicia 78. The teeth 72 on the reduced cog portion 74 are engaged with terminally formed circumferential teeth 82 and 84 respectively defined on the sleeves 46 and 48. The pointer 80 retains the member 70 on the shaft 44.

It is to be noted that the tubular member 38 is provided with cross hairs 86 supported therein. In use, as noted previously, the sight arm 32 is adjusted in the bracket 20 by winged setscrew 30 for proper windage. It is now necessary to properly adjust the elevation and this is done by sighting through the aligned transverse prism lenses 66 and 68. Yardage indicia 78 as noted is formed on the enlarged co g portion 7 6. By rotating either of the end caps 54 and 56 or the enlarged cog portion 76, the end caps 54 and 56 will be caused to rotate ,inopposite directions, with the ,prism lenses 66 of courseflturnin goppositely. Inasmuch as the prism 'lenses are tapered, as indicated, as :previously .ex- 'plained, therotation will effectively change the sighting between the lenses 66 and 68 so as to.var'y the effective elevation. It will lbe appreciatedthat the c'og172 enjgaged with. the teethj82 and '84, of the sleeves 46 and '4Q,respctively, -couples the sleeves 46 and48. so as .to assure that they rotate .in opposite directions- Inflieu of the central tubular member showndefining Icircunffereritial s'lots, 'themerriber may be scored around the entire circumference on either end. Of course, the ,particular materialsutiliied for. any of'the elements are not critical and .anysatis'factory'material maybe employed depending upon desired manufacture techniques.

The foregoing is considered as. illustrative only of I the principles of the invention. Further, since numerous modifications and changes will readily. occur to those skilledin the art, it .is not desired to flimit the invention .tothe exact construction and operation shownand described, andaccordingly all suitable modifications sand eguivalentsmaybe resorted to falling within the .scope f'the invention as claimed.

What is claimed as newis as follows:

1. An archery 'bowsight comprisinga cylindrical tube having circumferential slots thereinin the .endportions and on diametrically opposite sides thereof, means for securing said tubeon a bow, sleeves mounted for .rotary adjustment on the end portions of the tube, shoulder setscrews threadedly mounted in the-sleeves in engagement with the tube. and operable in. the slots for .positively retaining the, sleeves against longitudinal sliding movement, for positively flimitin'g rotary '.movement of the sleeves and for 'frictionally, securingsaid sleeves in rotatably adjustedposition, a,pair of coacting prismllenses,

-means removabl'y securing saidilenses on the sleeves, and means ,Qperatively. connecting 'the sleeves for rotaryadjustment in unison in opposite directions.

' "2, An archery-bQws'ig'ht comprising a cylindrical tube having circumferential slots therein in .-the end portions andon diametrically oppositev sidesthereof, means for securing saiditubeiolna bow,.sleeves mounted -forrotary iadjustmenton'theend portions of the tube, shoulder setscrews threadedly mounted in the sleeves in engagement on the shaft and retaining said .dialthereon and cooperable with the dial for adjusting the sleeves.

3. An archery bow sight comprising a cylindrical tube having circumferential slots therein in the end portions and on diametrically opposite sides thereof, means for securing said tube on a bow, sleeves mounted for rotary adjustment on the end portions of the tube, shoulder setscrews threadedlymounted in the sleeves in engagement with the tube and operable in the slots for posi tively retaining the sleeves against longitudinal sliding movement, for positively limiting-rotary movement .of the sleeves and for, frictionally'securingsaid-sleeves rotatably adjustedt position, arpair of coacting ,prism lenses,

means removably securingrsa'idlenses on the sleeves, and

means operativel'y connecting the sleevesfor rotaryadjustment in unison in opposite directions, seiidsecondnamed means including rings threaded on the sleeves, aperturedend-caps telescopically mountedonthe rings with the lenses therebetween, and setscrews. threaded through the caps and the rings .anduengag ed with .the

sleeves for locking said rings in..position thereonand for securing said caps on said rings.

4. An archery bow sight comprising .a cylindrical .tube

"having circumferential slots therein in the end .portions and on diametrically opposite sides thereof, means for securing'said tube on a bow, sleeves mounted for rotary adjustmenton the end portions of .the tube, shoulder setscrews threadedly mountedin -.the sleeves inlengagement with the tube and operable in .theslotsforposijtively retaining the sleeves against longitudinal sliding movement, for positively limiting rotary "movement of the sleeves and for 'frictionally "securingsaid sleeves in rotatably adjusted position, apair of coactingprismlenses, means .rern'ova'bly securing said lenses on vthefsleeves and means operatively connecting the sleeves. for .trotary adjustment 'in unison in oppositefdirections, the secondnamedmeans including rings threaded on tthe sleeves, 'apertured end caps telescopically mounted on the rings 'and engaged with the first-named .gears, andwapointer with'the'tube and voperable ,inthe slotsfor .pos'itively retaining the sleeves against longitudinal: sliding movement, lforjp sitivelyflimiting rotary movementof the sleeves and jfor'lfric'tionally.securing said :sleeves .inrotatably adjusted position, a pair ofJcQacting prism,.lenses,' meansremove ably securing said lenses onfthe sleeves, andrmeans-operatively, connecting .the sleeves fordrotary adjustment in unison 'in opposite directions, the :last-namedrneans inrcluding arradial shafnfixedly mounted on the tube between the sleeves, gears on. the inner ends of said sleeves, a

dial.journaled on the shaft, a gear fixed on the dial and .engagedwith the first-narned gears, and aigpointer fixed fixed on the shaft for retaining said dial thereon .-and cooperable with the dial "for adjusting .the sleeves,

References Citedin the file ofithis ,pa'ten't Q UNITED STATES PATENTS Michelson a; May 1 1, 1909 

1. AN ARCHERY BOW SIGHT COMPRISING A CYLINDRICAL TUBE HAVING CIRCUMFERENTIAL SLOTS THEREIN IN THE END PORTIONS AND ON DIAMETRICALLY OPPOSITE SIDES THEREOF, MEANS FOR SECURING SAID TUBE ON A BOW, SLEEVES MOUNTED FOR ROTARY ADJUSTMENT ON THE END PORTIONS OF THE TUBE, SHOULDER SETSCREWS THREADEDLY MOUNTED IN THE SLEEVES IN ENGAGEMENT WITH THE TUBE AND OPERABLE IN THE SLOTS FOR POSITIVELY RETAINING THE SLEEVES AGAINST LONGITUDINAL SLIDING MOVEMENT, FOR POSITIVELY LIMITING ROTARY MOVEMENT OF THE SLEEVES AND FOR FRICTIONALLY SECURING SAID SLEEVES IN ROTATABLY ADJUSTED POSITION, A PAIR OF COACTING PRISM LENSES, MEANS REMOVABLY SECURING SAID LENSES ON THE SLEEVES, AND MEANS OPERATIVELY CONNECTING THE SLEEVES FOR ROTARY ADJUSTMENT IN UNISON IN OPPOSITE DIRECTIONS. 